Joined init_security_group and init_isolation_group into the same method. Did the same for their destroy equivalents
Unsynchronized the call_packetfilter_service method to avoid deadlocks
Unfinished implementation of translate_logging_address
Don't destroy vnics when when doing a poweroff or a soft update. There's no chance of the host node changing on power on so security groups should remain applied. Also make the destroy_vnic method synchronized so it will run before the vnics' host node is set to null